Under-water periscope



a June 30, 1925.

W. F. YANCEY UNDER WATER PERLscoPE Filed DeG. 28, 1925 Patented June 3o, 1925.

UNITEDSTATES wrnnrniwr FLETCHERYANCEY, or PHILADELPHIA, PENNSYLVANIA.

i .i UNDER-VWM?E1sk i rnarscorn.

Application mea December 2a, 1923. serial No. 683,191.

T0 all.V whom t may concern.' 'y

Be 1t-known that I, WILLrAM F. YANonY, a: citizen of the United States, residing at Y Philadelphia, in the-county of Philadelphia,

State of Pennsylvania, have invented certain new and useful Improvements in Under- `Water Periscopes; and I dovhereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the artV to which it ap ertains to make and use the same.

his invention relates to new and useful improvements in optical instruments, and particularly to instruments of the nature of periscopes.

The principal Vobject of the present invention is to provide a device of this character by means of which an object, sunken beneath a body of water, may be located, and particularly that of the body of a drowned person.

Other objects and advantages will be apparent from the following description when taken in connection withV the accompanying drawing.

In the drawing: p

Figure 1 is an elevation of the device.

Figure 2 is a vertical longitudinal central sectional view through the device.

Figure 3 is a bottom plan view of the device.

Referring particularly to the accompanying drawing, 10 represents a tube of suitable length and diameter, through the upper end of which the observer looks.V This tube is formed in sections that are adapted to telescope, said sections being designated respectively 10 and 11. Extending upward, longitudinally of the lower section 11, to points slightly beyond the upper end of the section, and at diametrically opposite sides, are the guide rods 12. One of these rods, that designated by the numeral 12', is in the form of a worin shaft, and extends longitudinally of the upper section 10 to a point adjacent the upper end thereof, where it is rotatably supported in a laterally extending bracket 13, carried by said section. On this upper end of the rod or shaft 12 there is fixed a bevel gear 14. Carried by the lower end of the upper tube 10, at diametrically opposite sides, are the guide eye 15, and the nut 16, respectively, the former receiving the rod 12 slidably therethrough, while the latter receives the screw shaft 12 therethrough. Alsosupported in the bracket 13 l is 'a laterally extending shaft 17 lhaving on its outer 'end a crankhandle 18, while its inner. end carries a bevel gear 19 meshing with thev gear 111, and by means of which the screw shaft is adapted to be rotated for the purpose of moving the section 10 longitudinally of the section 11. Fixed in the upper end of the tube 10 is a pair of field glasses 20.

Carried by the lower end of the section 11 is a horizontally disposed and fiat disk 21, and secured in any suitable manner, to the lower face thereof, is a plane mirror, or series of mirrors 22. Secured within the lower end of the section 11, and extending downwardly therefrom, toa suitable distance below the tube, are the bracket arms 23, and supported on the lower ends of said arms, and centered directly below the lower end o-f the tube section 11, is a plano-convex disk 24e, the upper convex face of which forms a mirror. Carried by the arms 23, directly below the disk 21, is an electric lamp 25, disposed in a socket 26, wire 27 leading therefrom upwardly, along the tube sections, to a suitable source of current, not shown.

Secured to the disk 21, and depending therefrom, in enclosing relation to thel elements carried by the lower end of the tube section 11, is a transparent glass casing 28, which4 protects the mirrors, and prevents short-circuiting of the current to the lamp.

In the operation of the device, the lower end of the tube section 11 is submerged' in the body of water, the object sought being refiected by the mirror 22 onto the convex mirror 24, such reflection being observed at the upper end of the tube. By rotating the crank handle the sections 10 and 11 may be extended and withdrawn, to vary the length of the sight tube, and by properly adjusting the focus of the field glasses, the object on the mirror will be brought closer to the eye of the observer. By reason of the fact that the mirrors are circular, the objects beneath the water will be reflected from all directions.

VVhat is claimed is:

1. A periscope including a sight tube, a plane reflector carried transversely by one end of the tube, and a curved reflector supported in spaced relation to said tube end and centrally with respect to the plane reflector, said curved reflector being arranged to receive reflections from the plane reflec- Y spaced relation belowA the saidtubefend and centrally of said plane mirror, said convex mirror being disposed in position to receive reflections from theplane -inirror and to re-y flect such reflections through said tube-` 8. A periscope'includingia` sight tube, a-

horizontal dislccarred by one end of the tube and Vreceiving the end of the tube through the center thereof, a plane mirror carried by the lower face of the disk sur- 1 rounding the end of the tube, supports depending from the end of the tube, a planoconvex disk carried byV the supports in spaced'relation to the plane mirror and have ing itsconvex reilectingsurface arranged in position to receive reflections `from the planev mirror and to reflect such reflections upwardly through the tube,fand a light source supported beneath the planoconvex disk.

4. A periscope including telescoping sections,a plane horizontal reflector carried by one, section, aconvex reflector carried by saidcsectlon centrally therebelow and 1n reflecting relationto the plane reflector, means for adjusting the sections longitudinally with relation to each other, and means in the outer end of the other section for magnifying; the` reflections fromthe reflectors. y

i In testimony whereof, I affix my signature, in thepresence of two witnesses. y

y y WILLIAM FLE,Tonne` YANCEY.` i lVitnesses: Y i' y VSAMUEL GARBER, REUBEN COHEN, Jr. 

